The Smile of a Ghost (Merrily Watkins Mysteries)

The border town of Ludlow has it allexquisite medieval streets a parish church the size of a cathedral and a weight of history and legend. After a young teenage boy dies his grandmother becomes convinced shes still seeing her dead grandson in the old town. Merrily Watkins parish priest is brought in to find out if it is dementia delusion or something even more disturbing?